From my experience UCAS point/A-levels are a good filter for firms when it is difficult to asses a graduate based on their University alone, hence why minimum UCAS points are prevalent in the requirements listings for graduate positions.
I hope they don't find out about the A level courses I dropped then :\ And that one I failed to mention on my CV cause I got a U...
My other grades from A level are fine though; got 2 As
I love how my grades are either very good, or extremely shit. There's no middle ground